He says that because Bitcoin has been around so long now, it should be possible to crowd source a private key for almost any specific public address as he reckons there will now be databases out there with trillions upon trillions of matched key pairs. I say this is rubbish and it cannot be done.
If your friend thinks so (and he's not the only one), then you need to give him the challenge to have fun for the rest of his life. From time to time you can ask him if he has found something, and maybe after a while, he will realize how wrong he is
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